1216901507 has 2 divisors, whose sum is σ = 1216901508. Its totient is φ = 1216901506.

The previous prime is 1216901479. The next prime is 1216901537. The reversal of 1216901507 is 7051096121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216901507 - 2¹⁴ = 1216885123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216901537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608450753 + 608450754.

It is an arithmetic number, because the mean of its divisors is an integer number (608450754).

Almost surely, 2^1216901507 is an apocalyptic number.

1216901507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216901507 is an equidigital number, since it uses as much as digits as its factorization.

1216901507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 1216901507 is about 34884.1153965526. The cubic root of 1216901507 is about 1067.6243643718.

Adding to 1216901507 its reverse (7051096121), we get a palindrome (8267997628).

The spelling of 1216901507 in words is "one billion, two hundred sixteen million, nine hundred one thousand, five hundred seven".